package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Service;
import com.itheima.constant.MessageConst;
import com.itheima.dao.MemberDao;
import com.itheima.dao.OrderDao;
import com.itheima.dao.OrderSettingDao;
import com.itheima.entity.Result;
import com.itheima.pojo.Member;
import com.itheima.pojo.Order;
import com.itheima.pojo.OrderSetting;
import com.itheima.utils.DateUtils;
import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.locks.InterProcessLock;
import org.apache.curator.framework.recipes.locks.InterProcessMutex;
import org.apache.curator.retry.RetryNTimes;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

import java.util.Date;
import java.util.List;
import java.util.Map;

/**
 * 体检预约服务
 */
@Service(interfaceClass = OrderService.class)
@Transactional
public class OrderServiceImpl implements OrderService {

 @Autowired
 private OrderSettingDao orderSettingDao;
 @Autowired
 private MemberDao memberDao;
 @Autowired
 private OrderDao orderDao;

 //体检预约
 @Transactional
 public Result order(Map map) {
  /**
   1、检查用户所选择的预约日期是否已经提前进行了预约设置，如果没有设置则无法进行预约
   2、检查用户所选择的预约日期是否已经约满，如果已经约满则无法预约
   3、检查用户是否重复预约（同一个用户在同一天预约了同一个套餐），如果是重复预约则无法完成再次预约
   4、检查当前用户是否为会员，如果是会员则直接完成预约，如果不是会员则自动完成注册并进行预约
   5、预约成功，更新当日的已预约人数
   */
  //获取日期
  String orderDate = (String) map.get("orderDate");
  Date date = DateUtils.parseString2Date(orderDate);
  OrderSetting orderSetting = orderSettingDao.findByOrderDate(date);//根据日期查询预约设置信息
  if (orderSetting == null) {
   //所选日期没有提前进行预约设置，不能完成预约
   return new Result(false, MessageConst.SELECTED_DATE_CANNOT_ORDER);
  }
  if (orderSetting.getReservations() >= orderSetting.getNumber()) {
   //所选日期已经约满，无法预约
   return new Result(false, MessageConst.ORDER_FULL);
  }
  //判断是否在重复预约
  String telephone = (String) map.get("telephone");
  Member member = memberDao.findByTelephone(telephone);
  if (member != null) {
   Integer memberId = member.getId();//会员id
   Integer setmealId = Integer.parseInt((String) map.get("setmealId"));//套餐id
   //这里需要调整 Order类的 构造方法
   Order order = new Order(memberId, date, setmealId);
   List<Order> orderList = orderDao.findByCondition(order);
   if (orderList != null && orderList.size() > 0) {
    //用户在重复预约，不能完成预约
    return new Result(false, MessageConst.HAS_ORDERED);
   }
  }
  if (member == null) {
   //当前用户不是会员，需要自动完成注册
   member = new Member();
   member.setName((String) map.get("name"));
   member.setPhoneNumber(telephone);
   member.setIdCard((String) map.get("idCard"));
   member.setSex((String) map.get("sex"));
   member.setRegTime(new Date());
   memberDao.add(member);
  }
  //构造超时重试策略，每1s重试一次，重试10次
  RetryPolicy retryPolicy = new RetryNTimes(10, 1000);
  //构造客户端
  CuratorFramework client = CuratorFrameworkFactory.newClient("localhost:2181", retryPolicy);
  // 启动客户端
  client.start();
  //构造锁
  InterProcessLock lock = new InterProcessMutex(client, "/locks");
  try {
   //获取分布式锁
   lock.acquire();
   //保存预约信息
   Order order = new Order(member.getId(),
    date,
    (String) map.get("orderType"),
    Order.ORDERSTATUS_NO,
    Integer.parseInt((String) map.get("setmealId")));
   orderDao.add(order);
   //更新已预约人数
   orderSetting.setReservations(orderSetting.getReservations() + 1);
   orderSettingDao.editReservationsByOrderDate(orderSetting);
   return new Result(true, MessageConst.ORDER_SUCCESS, order.getId());
  } catch (Exception e) {
   return new Result(false, MessageConst.ORDERSETTING_FAIL);
  } finally {
   try {
    lock.release();
   } catch (Exception e) {
    e.printStackTrace();
   }
   //随眠5s等待任务执行完成
   try {
    Thread.sleep(5000L);
   } catch (InterruptedException e) {
    e.printStackTrace();
   }
   client.close();
  }
 }

 //根据id查询预约信息，包括体检人信息、套餐信息
 public Map findById(Integer id) {
  Map map = orderDao.findById(id);
  if (map != null) {
   //处理日期格式
   Date orderDate = (Date) map.get("orderDate");
   map.put("orderDate", DateUtils.parseDate2String(orderDate));
  }
  return map;
 }
}